I think if West Ham take tonight with at least 2 goal margin, they will be the firm favourite to win this cup, no matter the results elsewhere. As said before, I think Basel are solid, Nice too, even if they're a shadow of themselves 2 seasons ago, Fiorentina... It's almost fitting they're all here tonight, midtable mediocrity in leagues, and it doesn't match up to Hammers closer to relegation than to halfway point, but I'm taking into account the EPL is a pretty tough league.
Hammers, Nice, Fiorentina acca?
Regardless of the results in national leagues, I have the feeling that Fiorentina is the best team between them. They are doing pretty good in Conference League and maybe the most stable one in the list.
West Ham got a 1 - 1 draw vs Gent. Maybe playing home in the second leg could help them pass this round but I doubt they could go further with the actual performance.
Poznan 1 - 4 Fiorentina currently, not the best team to judge Fiorentina perfectly but we can say they passed to semifinals.